What is peak current

We will explain in detail about the peak current in switching power supplies, AC/DC power adapters — desktop & wall-mount. We can supply products that support your peak current requirements.

About Peak Current

 When using DC motors or pumps…

When we receive inquiries about adapters or built-in power supplies, we often ask customers about their use case, as many of them intend to use the products in devices with DC motors or pumps.

This has become increasingly common in recent times.

Products using DC motors or pumps are surprisingly common in daily life, such as drive units of fans in electric fans and air purifiers, sewing machines, and paper feeders in scanners and copiers.

When we find out that the customer's equipment uses DC motors or pumps, we ask, “Is the peak current within acceptable limits?”

Peak current refers to the sudden surge current that occurs when powering DC motors.

If this is overlooked, it may cause the power supply to enter protection mode unexpectedly, stopping device operation, or it may lead to early failure of components used in the power supply, ultimately disabling the equipment.

It is best to address peak current issues at an early stage, so we request waveform diagram data of the peak current from customers needing adjustments.

For customers who have difficulty providing waveform data, we ask for information such as the maximum peak current value and the duration of that current.

Our lineup includes open frame switching power supplies like the 240W UOHC3240 and UOHL3240 series, which support double peak load, as well as desktop and wall-mount AC/DC power adapters in the PA series that can handle double peak loads for 1 to 10 seconds.

Based on these standard models, we propose solutions that consider safety while meeting customer requirements.

If you are considering using a power supply for equipment with DC motors or pumps, which may be affected by peak current, please feel free to contact us.

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